Improvement in pulley-blocks



. between the walls of the been previouslyi'emoved.

H NRY SMITHQOE PROVIDENCE RH a r QHISQIRIVGHT rornno. Remus, or same PLACE.

one ISLAND, ASSIGNOR OF'ONE-HALF Letters Patent No. 115,248, dated May 23, 1871. i

IMPROVEMENT IN PULLEY-BLOC'KS.

l The Schedule refelred to in these Letters Patent and making part of the same.

I To all cuhom 'it ant ancer.-

Be it known thatLIlLauRY SMITH, of the city-and county of Providence, inthe State of Rhoda-Island,

have. invented certain new and useful Improvements in Pulley-Blocks] v y My invention consists .ina novel mode of mounting the sheave-in theblock, andi n providing a peculi'arly constructed self-lubricatingchamber; and I do hereby declare that the following specification, taken in connection withthe drawing furnished and forming 3 part of the same, is a true, clearand exact dee -1 .tion thereof. 1 l

Referring tofthe drawing-- 1 Figured represents oneyof myimpmved "pulleyblocks in perspective. a.

Flgureil represents the same 1n cross vertical section. r

i Figure 3pthesanie inlongitudinalvertical section.

- A is the sheave, and

B and B are the sides bfthe block.

y, ahdCar-e the block-journals,located opposite I each other in the sidesof theblock.

r The former is constructed with a partially-closed outer end; the latter is open at both ends, but is provided. with a removable face-plate, c, which serves as a cap forthe outside, and closingit to correspond with the other journal. y r Dis an axle, of uuiformdiameter, fitted to the jour: .nals O and G, and of a length "slightly less than the" distance between the. inside'of the head-of the journal O and the inner face of. the face-plate c.

The sheave is east with an interior cavity, E, and

l isproyided with a steel bushing, F, which-is rigidly attached to the sheave.

Before being. insertedfone ormore ducts, j; are

drilled midway between the ends of the chamber,

which isthen loosely filled with any suitable fibrous absorbent. l y

A- duct, g, is drilledin the hub, of the sheave, provided with a suitable screwy-plug.

matter, by-the way of the duct g, the sheave is placed block, thearrle D having andpassing through the, bushing F, for which it is a hearing. r r

j The end plate 6 isthen secured in position by screws or otherwise. 1, M The main object of the end plate is to; secure the It ill be observfedthatthe ducts f are located at .apointImidway-hetween theinterior ends of the chamnection with lubricating matter.

After supplying the chamber E with lubricating r The axle isthe'n replaced, entering the bearing 0,.

absorbent, and then only while the .block is in actual use.

liable to be thrown down flatwise, there to remain untilagain required.

It will also be observed that the sheave is mounted on an axle, which in turn is mounted in thebearings O and G in the walls of the block. 7

By this arrangement it is obvious that the axle will notonly wear evenly and truly, but that the friction between the wheels and the blockwill be divided between the wheel bearing on the axle and the axle bearing in the journals 0 and v0'.

The lubricating matter extends from the pulley bearing to the right and left, and keeps the journals G in proper working order.

,I am aware that chambers have been constructed in pulleys and wheels of various kinds, and'that fibrous absorbents have been largely employed therein in conknow of none, however, which has been so constructed and arranged that, regardless of the position in which the wheel might be, the oil,-could not escape by way of the fibrous absorbent, and even then only while the wheel was in operation.

. Having thus described my invention,

I claim as new and desire to secure by Letters Pat- 1. The lubrrcating-chamoer '13 within the wheel,

- surrounding th'e sleeve, and provided with the sup ply-duct q and the discharge-duct f, the latter being so located with reference to the interior ends of the lubricating-chamber that oil can only be discharged by the attraction of the fibrous absorbent, substantiallyas shown and described. A

2. The combination of the bearings O and O, the sheave, and the loose axle D, the whole being so arranged that the sheave is free to revolve on the axle and the axle freeto turn in its bearings, substantially as shown and described. r

3. The combination of the block with the bearings ,G and Q, the sheave, the loose axle, and the remov-u able end plate 0 so arranged that the axle and sheave may be freely removed from the block, substantially as described.

- 4. vThe improved pulley-block with its sheave, pro

vided with a lubricating-chamber, and loosely mounted upon, an axle or shaft, which in turn is free to revolve in bearings provided therefor in the walls of the block, all substantially as described- 1 ber-E, on theline oftheaxle. It is] obvious, therefore,that if the chamberbe .properlycharged, say to half its capacity, regardless of the position of the blockyit is. impossibleforthe oil to be discharged from the ducts except by attraction of the fibrous l HENRY SMITH.

ffioz. M

It is this peculiarity of construction that gives my 3 

